anderson



L. ANDERSON.

PUMP.

APPLICATION FILED OCT. 21, I920.

Patented Oct. 4, 1921.

4 SHEETSSHEET 1- L. ANDERSON.

PUMP.

APPLICATION FILED 0CT.21, 1920.

Patented Oct. 4, 1921.

4 SHEETSSHEET 2.

L. ANDERSON.

PUMP.

APPLICATION FILED 0U. 21. 1920.

Patented Oct. 4, 1921.

4 SHEETS-SHEET 3- L. ANDERSON.

PUMP.

APPLICATION FILED 0cT.21, 1920.

Patented Oct. 4, 1921.

4 SHEETS-SHEET 4.

PATENT OFFICE.

LARSANDERSON, OF CHICAGO, ILLINOIS.

ruivir.

Specification of Letters Patent.

Patented Oct. 4, 1921.

Application filed October 21, 1920. Serial No. 418,363.

To all whom it may concern." 1

Be it known that'l, Lnns ANDERSON a citizen of the United States, residing at Chicago, in the county of; Cook and State of Illinois, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to improvements in pumps particularly adapted though not necessarily limited in itsuse with air compressors and vacuum producers, and one of the objects of the inventionis to provide an improved compact structure of this character which will be of a comparatively simple construction and which will be effective and efficient in operation.

To the attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in'substantially the construction, combination and arrangement of the several parts, hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this invention and in which Figure 1 is a view partly in side elevation and partly in section.

Fig. 2 is an irregular horizontal view of a portion of the apparatus.

Fig. 3 is a view taken on line 33, Fig. 1.

Fig. 1 is a sectional view taken on line Fig. 5 is a detail. perspective view of some of the parts showing the cooperating elements in a separated position.

Fig. 6 is a detail bottom plan view of one of the elements.

Referring more particularly to the drawings the numeral 10, designates a suitable supporting structure and connected with the structure is a substantially cup-shapcd portion 11, of a chamber or casing. This section 11,- is provided with a tubular portion 12, having arranged therein spaced bearings 13. The chamber or casing 11, is preferably of a sectional construction embodying an additional section 14, which is connected with the section 11, in any suitable manner such as by means of fastening bolts 15, and a head 16, is provided for the chamber. This head 16, is provided with a wall 17, which is inclined and the-head is secured in position in any suitable manner such as by means of the usual fastening bolts 18.

Within the head 16, is a fluid inlet opening 19, and a fluid outlet opening 20, is

also provided in the head and this latter opening is adapted to be closed by any suitable closure such as by means of a ball valve 21, arranged within a casing 22, which latter is adapted to be removably seated in the outlet opening.

Arranged within the casing or chamber thus formed is a rotatable substantially semi-cylindrical piston blade carrying element 23, which is provided with a stem or shaft 2 1, journaled in the bearings 13, and this stem or shaft 24, preferably projects beyond one of the bearings and is provided with a suitable sprocket wheel over which a suitable silent sprocket chain or driving belt 25, passes. This belt 25, also passes over a suitable sprocket or driving wheel on the shaft 26, of a motor 27, the latter being mounted upon the supporting structure 10, and by means of which motor the piston blade carrying element 23, is adapted to be rotated at any desired speed. If desired additional ball bearings 28, may be arranged adjacent the piston blade carrying element 23, and between the ole ment and the bearing 13, so as to take up the end thrust of the element 23.

This element 23 is preferably provided with a substantially flat face 28, and also with a slot or kerf 29, extending thereacross and opening through the said face. The bottom of the slotted portion 29, on oppo site sides of the diametric center thereof incline downwardly as at 30, to form inclined surfaces for a purpose to be set forth.

Carried by the element 23, is a fulcrum 31, which is provided with a stem 32, and a shoulder 33. This fulcrum is adjustable in a direction lengthwise thereof and transverse to the direction of rotation of the element 23, and to that end. there is provided in the element 23, a recess 34, which opens through the bottom of the slotted portion 29, and is adapted to receive the shoulder 33. This recess 34;, is provided with a reduced portion 35, communicating therewith adapted to receive the stem 32, and the reduced portion 35, of the recess forms a shoulder 36, against which shoulder one end of an elastic member or spring 37 rests while the other end of the spring engages the shoulder 33.

The fulcrum 31, is provided with cam shaped portions 38, for a purpose to be hereinafter set forth.

The element 23 fits within a portion of the casing or chamber 11, to substantially fill the same but so as not to interfere with the free rotation thereof and the fiat surface or face 28, thereof is spaced for a considerable distance from the inclined wall or face 17, of the head 16, and the inclined wall is disposed at an angle transverse to the axis of rotation of the element 23.

Arranged within the slotted portion 29, of the element 23, is a piston blade 39, which is provided with a conically shaped recess 40, opening through one face thereof intermediate its ends and this recess 40, is adapted to receive the fulcrum 31. The blade 39, is provided with recesses 41, opening through the ends thereof for the reception of supplemental piston blades 42, the outer peripheries of these Supplemental piston blades being of a configuration to conform to the contour of the chamber or casing 11. The supplemental blades 42, are provided with inclined faces 43, adapted to be en aged b the ends 44 of yieldable plungers. %ach o the-plungers embodies telescoping elements 4546, having an elastic member or spring 47, interposed therebetween. These plungers are arranged within suitable recesses 48, in the piston'bl'ade 39. One of the plungers is arrangedon each side of the fulcrum 31, so that one end of the plungers will engage and is adapted to movein contact with one ofthe cam surfaces 38, of the fulcrum. The tapered extremity 44, of the other element of the plungers contacts with and operates against the respective inclined faces 43, of the supplemental piston blade elements 42, and the plungers serve as a means for bolding the outer surface of the supplemental piston blade elements against the wall of the chamber or cylinder 11. When the piston 39, is in position within the slot or recess 29, of the element 23, and with the bottom of the recess 40, resting upon the fulcrum 31, the edge 49, of the piston will project for a considerable distance beyond the surface 28, of the element 23, and this edge 49, contacts with the inclined wall 17, and is held in engagement with said wall by means of the springor elastic member 37, which tends normally to move the fulcrum 31, in a direct-ion coinciding with the axis of rotation of the element 23.

It will therefore be seen that when the element 23 is rotated the piston 39, will be given a bodily rotation therewith and inasmuch as the edge 49, of the piston is held in contact with the inclined wall or surface 17, of the head 16, the piston will, during this bodily rotation with the element 23, be given an oscillating movement about its fulcrum 31, bythe inclined wall or surface 17 This v oscillating movement of the piston will be in The portions of the inlet opening 19 and outlet opening 20, which open through the wall 17, are preferably of a long, and narrow configuration so that they will be controlled by the edge 49, of the piston 39, movbetween the piston blade and the outlet opening 20. This operation will obviate the usual whistling or sound caused by the rapid rotation of the piston with respect to the openings and which would be occasioned in the event that one of the ports is allowed to rc- 3 main open at the time when the other port is closed. Obviously the valve 21, is set to a predetermined pressure so as to permit the fluid to be compressed between the piston and the valve 21, to a predetermined degree, before the valve 21, is opened.

In order to insure a fluid tight joint between the rotating elcment 23, and the inclined wall or surface 17, at points ad jaccnt the outlet opening 20, there may be provided between the wall 17 and the surface 28, of tho. rotating element 23, a suitable filler which is preferably of a conical shape and this filler is also of a sectional construction embodying the sections 5253, which are spaced from each other and one is arranged on each side of the piston 39, the base 54, of each of the sections being disposed adjacent th flat surface 28, of the element 23, and these sections are of such a height that portions thereof will be always maintained in contact with and will move across the inclined face 17 of the head 16. In order to maintain these portions of the elements 5253 against the inclined wall 17 there may be provided between these elements 52-53, and the element 23, suitable elastic members or springs 55, one end of each of which is seated in suitable recesses 56 in the base 54, of the respective elements 52-433, and the other end of each of these springs is seated in suitable recesses 57, in the surface 28, of the element It is thought that the operation of this device will be clearly understood from the foregoing description, but briefly stated it is as follows.

When the element 23, is rotated through the medium of the motor 27, the fulcrum 31, together with the piston 39, and the elements 52-53, will also be rotated, a bodily rotation being imparted to the piston 39.

Inasmuch as the spring 37, tends normally to shift the fulcrum longitudinally, the spring 37, and fulcrum 31, will hold the edge 49, of the piston 39, against the inclined wall 17, with theresult that when the piston is given this bodily rotation, and as the edge 49 moves across the inclined wall 17 an oscillating movement will be imparted to the piston so as to cause the same to move about the fulcrum 81. When the edge 49, of the piston 39, uncovers the opening 50, of the inlet port 19, fluid'will be drawn into the chamber 14, by the piston and through the opening 50. Fluid will continue to be drawn in through this opening until another portion of the edge 49, of the piston closes the opening 50. Afterthis opening 50, has been closed orwhen the piston 39, passes the opening 50, the fluid which has been drawn into the chamber in advance of the piston will, as the piston continues in its rotation, commence to be compressed between the advancing face of the piston and the valve 21, controlling the outlet 20. This pressure will continue to build up until it reaches a predetermined degree, or the degree for which the valve 21, has been set. As soon as the pressure exceeds this degree, then the valve 21, will be unseated and'the compressed fluid, will be forced through the opening 51, past the valve 21, and out of the discharge outlet 20.

This operation will continue and the pressure will be intermittently built up and then the fluid discharged, as the piston rotates.

During this bodily rotation of the piston and the oscillating movement thereof the plungers 45, operating on the inclined surface 43, of the supplemental piston blades 42, will cause the edges of the latter to remain in contact with the wall of the cylinder or chamber 11, to produce fluid tight joints between the piston 39, and the wall of the chamber. This is accomplished by reason of the fact that as the piston 89, oscillates upon its fulcrum 31, the adjacent ends of the plungers will move over the cam surface 38, of the fulcrum.

The elastic member 37, also operates to compensate or take up the wear between the edge of the piston 39, and the inclined wall 17, of the chamber.

If desired suitable oil or grease cups 58, may be provided wherever needed.

While the preferred form of the invention ha been herein shown and described it is to be understood that various changes may be made in the detailsof construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is 1. A pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for the said element intermediate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of said chamber being inclined transverse to the axis of rotation of the said piston element, means for rotating the said element, and means for maintaining one edge of the piston element in contact with the said inclined wall, whereby the piston element will be oscillated upon its fulcrum during such rotation, the last recited means embodying the fulcrum, said fulcrum being movable in a plane transverse to the plane of oscillation of the piston element.

2. A pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for the said element intermediate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of said chamber being inclined transverse to the axis of rotation of the said piston element, means for rotating the said element, and means for maintaining one edge of the piston element in contact with the said inclined wall whereby the piston element will be oscillated upon its ful crum during such rotation, the last recited means embodying the fulcrum, said fulcrum being movable in a plane transverse to the plane of oscillation of the piston element, and yielding means for controlling the movement of the said fulcrum.

A pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for said element intermediate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of the chamber being inclined transverse to the aXis of rotation of the piston element, means embodying said fulcrum for maintaining one edge of the piston element in contact with said inclined wall, means for imparting said bodily rotation to the piston element, there being a fluid. inlet opening and a fluid outlet opening for the chamber, supplemental piston ele ments carried by the ends of the said piston element, and means tending normally to maintain the said supplemental piston elements in contact with the chamber wall.

4. A pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for said clement intermediate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of the chamber being inclined transverse to the axis of rotation of the piston element, means embodying said fulcrum for maintaining one edge of the piston element in contact with said inclined forthechamber, supplemental piston ele-,

ments carried by the ends of the said piston element, and means tending normally to maintain the said supplemental piston elements in contact with the chamber wall, the last recited means cooperating with the said fulcrum.

5. A pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for said element intermediate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of the chamber-being inclined transverse to the axis of rotation of the piston element, means embodying said fulcrum for maintaining one edge of the piston element in contact with said inclined wall, means for imparting said bodily rotation to the piston element, there being a fluid inlet opening and a fluid outlet opening for the chamber, supplemental piston elements carried by the ends of the said piston element and plungers interposed between the said fulcrum and the respective supplemental piston elements and tending normally to maintain the latter in contact with the chamber wall.

6. A pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for said element intermediate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of the chamber being inclined transverse to the axis of rotation of the piston element, means embodying said fulcrum for maintaining one edge of the piston element in contact with said inclined wall, means for imparting said bodily rotatation to the piston element, there being a fluid inlet opening and a fluid outlet opening for the chamber, supplemental piston elements carried by the ends of the said piston element, ortions of said fulcrumrbeing shaped to form cam surfaces, and plungers interposed between the supplemental piston elements and the respective cam faces and cooperating with the latter for maintaining the supplemental piston elements in contact with the chamber wall.

.7. A. pump of the character described embodying a chamber, a piston element bodily rotatable in the chamber, a fulcrum for said element interm diate its ends and by means of which fulcrum the piston element is adapted for an oscillating movement in a plane transverse to the plane of its bodily rotation, one wall of the chamber being inclined transverse to the axis of rotation of the piston element, means embodying said fulcrum for maintaining one edge of the piston element in contact with said inclined wall, means for imparting said bodily rotation to the piston element, there being a fluid inlet opening and a fluid outlet opening for the chamber, supplemental piston elements carried by the ends of the said piston element, portions of said fulcrum being shaped to form cam surfaces, cushioned plungers interposed between the fulcrum and the respective supplemental piston elements and cooperating with the said cam surfaces for maintaining the supplemental piston elements in contact with the chamber wall, the said supplemental piston elements being provided with cam faces with which the respective plungers cooperate.

8. A pump of the, character described embodying a chamber, a bodily rotatable piston therein, one wall of the chamber being inclined to the axis of rotation of the piston, a fulcrum for the piston intermediate its ends, said fulcrum being shiftable, means tending normally to move the fulcrum and the said piston in a direction transverse to the plane of rotation of the piston for maintaining one edge of the piston against the said inclined wall, and means for imparting a bodily rotation to the piston whereby the latter as the edge thereof is moved over the said inclined wall will be rocked thereby upon its fulcrum, there being a fluid inlet opening and fluid outlet opening for the chamber.

9. A pump of the character described embodying a chamber, a bodily rotatable piston therein, one wall of thechamber being inclined to the axis of rotation of the piston, a fulcrum for the piston intermediate its ends, said fulcrum being shiftable, yielding means operating upon said fulcrum and tending normally to move the fulcrum and the said piston in a direction transverse to the plane of rotation of the piston for maintaining one edge of the piston in contact with the said inclined wall, said yielding means also operating to compensate the wear between the said wall and the cooperating edge of the piston, and means for imparting a bodily rotation to the said piston whereby the latter as it is moved over the said 111- clined wall will be rocked thereby upon its fulcrum. there being fluid inlet and outlet ports for the chamber.

10. A pump of the character described embodying a chamber, a bodily rotatable piston therein, one wall of the chamber being inclined to the axis of rotation of the piston, a fulcrum for the piston intermediate its ends, said fulcrum being shiftable, yielding means operating upon said fulcrum and tending normally to move the fulcrum and the said piston in a direction transverse to the plane of rotation of the piston for maintaining one edge of the piston in contact withthe said inclined wall, said yielding means also operating to compensate the wear between the said wall and the coiiperating edge of the piston, and means for impating a bodily rotation to the said piston whereby the latter as it is moved over the said inclined wall will be rocked thereby upon its fulcrum, there being fluid inlet and outlet ports for the chamber, both of said ports being controlled by the said piston.

11. A pump of the character described embodying a chamber, a rotatable element within the chamber, one wall of the chamber being inclined to the axis of rotation of said element, the portion of said element adjacent the said inclined wall being conical, the apex of the cone coinciding with the axis of rotation of the element whereby a portion of the said conical surface will be maintained in contact with said inclined wall as the element is rotated, a piston blade carried by said element and bodily rotatable therewith, a fulcrum for the blade intermediate its ends and also connected with said ele ment for rotation therewith and for shifting movement with respect thereto, means tending normally to shift the fulcrum with respect to the said element to maintain one edge of the piston blade in contact with the said inclined wall, and means for rotating said element to cause the said edge of the piston blade to be moved over the said inclined wall and in contact therewith to be rocked thereby upon its fulcrum, there being fluid inlet and outlet ports for the chamber.

12. A pump of the character described embodying a chamber, a rotatable element within the chamber, one wall of the chamber being inclined to the axis of rotation of said element, the portion of said element adjacent the said inclined wall being conical, the apex of the cone coinciding with the axis of rotation of the element whereby a portion of the said conical surface will be maintained in contact with said inclined wall as the element is rotated, a piston blade carried by said element and bodily rotatable therewith, a fulcrum for the blade intermediate its ends and also connected with said element for rotation therewith and for shifting movement with respect thereto, means tending normally to shift the fulcrum with respect to the said element to maintain one edge of the piston blade in contact with the said inclined wall, means for rotating said element to cause the said edge of the piston blade to be moved over the said inclined wall and in contact there with to be rocked thereby upon its fulcrum,

there being fluid inlet and outlet ports for the chamber, the conical portions of said element constituting sepa sections thereof, and yielding means operating upon said sections for maintaining portions of their conical surfaces in contact with the said inclined wall.

13. A pump of the character described embodying a chamber, a rotatable element within the chamber, one wall of the chamher being inclined to the axis of rotation of said element, the portion of said element adjacent the said inclined wall being conical, the apex of the cone coinciding with the axis of rotation of the element whereby a portion of the said conical surface will be maintained in contact with said inclined wall as the element is rotated, a piston blade carried by said element and bodily rotatable therewith, a fulcrum for the blade intermediate its ends and also connected with said element for rotation therewith and for shifting movement with respect thereto, means tending normally to shift the fulcrum with respect to the said element to maintain one edge of the piston blade in contact with the said inclined wall, means for rotating said element to cause the said edge of the piston blade to be moved over the said in clined wall and in contact therewith to be rocked thereby upon its fulcrum, there being fluid inlet and outlet ports for the chamber,

the conical portions of said element consti tuting sections separate from the main portion of the element, and yielding means interposed between the said main portion of the OlGliJllil and the said separate sections for maintaining portions of the said conical surfaces in contact with the said inclined wall of the chamber to form a fluid tight 3' oint therebetween.

it. A pump of the character described embodying a rotatable element, a piston carried by the element and shiftable with respect thereto in a direction lengthwise of the axis of the element, means for imparting a rotation to the element, means mounting said piston intermediate its ends upon the fulcrum for oscillation in a plane transverse to the axis of its bodily rotation, means cooperating with the piston for imparting such oscillating movement thereto, and means tending normally to shift the fulcrum with respect to the said element and with which last recited means the third recited means cooperates.

in testimony whereof l have signed my name to this specification, on this 12th day of October, A. D. 1920.

LABS ANDERSON. 

